<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Position Test: sticky element with top offset specified with percentage unit</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
  <link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos">
  <link rel="match" href="reference/position-sticky-top-002-ref.html">

  <meta name="flags" content="">

  <style>
  div.scrolling-container
    {
      background-image: url("support/100x100-red.png");
      background-repeat: no-repeat;
      display: inline-block;
      height: 250px;
      margin-right: 30px;
      overflow: auto;
      position: static;
      width: 150px;
    }

  div#first-scrolling-container
    {
      background-position: left bottom;
    }

  div#second-scrolling-container
    {
      background-position: left 100px;
    }

  div#third-scrolling-container
    {
      background-position: left 50px;
    }

  div.vertical-spacer
    {
      height: 100px;
    }

  div.sticky
    {
      background-color: green;
      height: 100px;
      position: sticky;
      top: 40%;
      width: 100px;
    }
  </style>

  <body onload="document.getElementById(&quot;first-scrolling-container&quot;).scrollTop = 50; document.getElementById(&quot;second-scrolling-container&quot;).scrollTop = 200; document.getElementById(&quot;third-scrolling-container&quot;).scrollTop = 300;">

  <p>Test passes if there are 3 filled green squares and <strong>no red</strong>.

  <!--
  first-scrolling-container: before reaching the sticking point
  -->

  <div id="first-scrolling-container" class="scrolling-container">  <!-- 150w x 250h viewport -->

    <div class="vertical-spacer"></div> <!-- 150w x 100h   -->

    <div class="content">

      <div class="vertical-spacer"></div> <!-- 150w x 100h   -->

      <div id="first-sticky" class="sticky"></div> <!-- 100w x 100h -->

      <div class="vertical-spacer"></div> <!-- 150w x 100h   -->

    </div>

    <div class="vertical-spacer"></div> <!-- 150w x 100h   -->

  </div>

  <!--
  second-scrolling-container: when reaching the sticking point and beyond
  -->

  <div id="second-scrolling-container" class="scrolling-container">  <!-- 150w x 250h viewport -->

    <div class="vertical-spacer"></div> <!-- 150w x 100h   -->

    <div class="content">

      <div class="vertical-spacer"></div> <!-- 150w x 100h   -->

      <div id="second-sticky" class="sticky"></div> <!-- 100w x 100h -->

      <div class="vertical-spacer"></div> <!-- 150w x 100h   -->

    </div>

    <div class="vertical-spacer"></div> <!-- 150w x 100h   -->

  </div>


  <div id="third-scrolling-container" class="scrolling-container">  <!-- 150w x 250h viewport -->

    <div class="vertical-spacer"></div> <!-- 150w x 100h   -->

    <div class="content">

      <div class="vertical-spacer"></div> <!-- 150w x 100h   -->

      <div id="third-sticky" class="sticky"></div> <!-- 100w x 100h -->

      <div class="vertical-spacer"></div> <!-- 150w x 100h   -->

    </div>

    <div class="vertical-spacer"></div> <!-- 150w x 100h   -->

  </div>
